Indicating device



Jul 1e 3,1930. 4 H HLAI H 1 ,761,751

INDICATING DEVICE Filed April 6, 1928 2 she ts sheei 1 J8 awuemtoz Q I/WV'M June 3, 1930. v sc cl-l I 1,761,751

INDICATING DEVICE Filed April 6, 1928 2 Sheets-Sheet 2 V INVENTOR IMao/F ATTORN EYS V V of the dial plate.

Patented June 3, 1930 res PATENT OFFICE HERMAN SCHLAICH, or ELMHURST,NEW Your:

INDICATING DEVICE Application filed April 6,

The present inventionrelates to indicators which although susceptible toother uses, find particular applicationto thermometers of the distancetype. The invention will be best understood by reference to thefollowing detailed description taken with the annexed drawing in which,i f I I Figure 1 is an'enlarged view of an illustrative embodiment; I ie Figure 2 is a view taken in section along "the line 22 of Figure 1; i.Figure3 is a diagrammatic view showing the illustrative device'asapplied to the cooling-system of an internal combustion engine; Figure4is aldetail of the auxiliary-indieating element, the straight linesbeing used to indicate contrasting colors d V Figure 5 a viewofja'second embodiment;

Figure v6 is a view of the instrument with dial a d indicator removed,and showing the actuatingmechanism ofthe gauge;

7 Figure '7 is a view in central verticalsec- Figure 8 is a view on areduced scaleof the indicating element, and, g:

. Figure9 is a view also ona reduced scale Both of the describedembodiments are characterized bythe provision in the instrument for anauxiliary indication which will be visible-for certain positionsof themain indicator, Preferably, and I 'asshown, the

i auxiliary indicator"in both embodiments, is

I continuously actuated, whereby the actuation of such indicator in noway effects the accui racygo'fthe main indicator. In the embodimentffirst ,Sdescribed, the slight additional work required for the actuationof the :aux-

ili ary indicator is uniformly distributed over the entire operatingrange of the main indicator. In the second described embodiment,

. this idealis further carriedout so 'as'to include a construction inwhich the auxiliary indicator forms a part ofthe main indicator. Bothembodiments described are particularly dei signed for indicatingtemperaturesgo'f automobileinternal combustion'engines and Pref-'erablyi both provide for a danger indication, not only at the boilingpoint of water, but also-ofalc'ohol.

1928. Serial NO. 267,842.

, Referring to the drawings by characters of reference, 10 denotes thedial of the instrument which in the embodiments shown in all the figuresis a thermometer of the distance type adapted to indicate thetemperatureof the cooling system of an automobile, the installation of the devicebeing apparent from Figure 3. In said figure, 12 is the usual hoseconnection between the cylindrical jacket outlet 14 andthe radiator 16.i 18 is a bulb concontraction is utilized to operate the usual Bourdontube 20 -of the indicating instrument denoted generally by 21 mounted onthe dash 22, bulb 18 beingv joined thereto by means of a sheathedcapillarytube 23 of known'type. Movement of the free end'of the Bourdoncoil is transmitted to a pointer 24 through its arbor 26 attached tosaidfree end, the other end of said coil being anchored to the casing 27 ofthe instrument. A compensating spring 28 isalso attached to said arbor26. The instrument is preferably provided with the usual cover glass 29;

' The device as described thus far is standard in the art and theapplication of the present invention to such an instrument may now begiven. Referring to Figures] and 2, mounted on the arbor 26 is a gear 32which meshes with a pinion S lattached to an auxil- "iary lndicator86-which latter is conveniently dicates' steam on the-dial. 'As abovestated,

taining 'a suitable fluid whose expansion or it is also a, feature ofthe invention to, indicate 7 a similar condition obtaining when alcoholis used inthe radiator'of the automobile and for this purpose spot 41 isalso provided on dial 36, suchspot conveniently being ofcircumferentiallyjelongated shape and :disposed so that it willbevisible in a second sight o'pening 12 at the proper time, prior to theindication given by spot 38. LDue to'its elongated the alcohol-Waterboiling point range. e lnthe embodiment described in the foregoing itwill be seen that in addition'to the regular dlal pointer for indlcatlngmotor temperature,- I provide an auxillary indlcator or I signal whichwill indicateto the operator a safe fcondition at all tirnesexceptfwlrenthe pointer is indi'cating an overheated condition of the motorwhereupon the signal changes to" "T n in h addi io lLend-.merestrkingmanner drawsthe attention of the operator to such conchtlon of themotor; a I I Referrlng to Flgure 5, an lnstrument havnisn is, provided,the same consisting of a BCilI'ZdOIlC-OHBO an inlet conne' cr I H g i l-,tion 51in the'b'ack 'ofie' casing 52. Bourdon f n temperatureindi;cating device d'aptedto, give rr'io'tor temperat res, a may-inf Qcoil 50is anchored 5e53, thefree end'thereof "beingfconnectedto acompensating spring 54:

' whichinturn is connected by means of a. link v "55 to" a n ar m 5650fa segment 57. Segment- :is pivoted et' 59 andits teeth enga T i'o'n 600i; an arbor 51", said arbor carrying an" indicatordisc 62, "th'elatterbe ingrsecnredto sejid arbor by means of hub 63." As shown besiniFig'ure disc-6 2" carries' alcircnlar temperature scalefi, and atornear the peri phery thereof anyannulzn bend; anda hand 66-comprisingpretereh'ly the remainder of t irw e enee band fi r i r b yjbe" *i 'ngco-lored red, and the'hain-d 65 green; 111] front ofthe disc edia'l68hfzi'vi'ng arcshapedopening 69 (through which-thescale 64 s @v' i ibl) is st i fin fypointer 6e;

p if' ight hql s. 7 ,1 Z5T PQ Y Y pr re .S'thlyfdisposed" someWhatv inthe manner es I sh'ownih' the Figure Sand; 9. fit will 106 .1 1-

deristoodlthat the jzi-rrangen entl of the hands 65,66 with referencetothe scale6and'pointa dicato'f" 'heing" "separ' er 69 issuchlth'at theredband is vVisible in the left hand sight opfiil'i lg'l Whe'ntheboiling poi'nt ofpalcoh'ol is rea(Shed,v and said band will hevisiblethrough opening? 2 when fee '. roli th bjr ge; g ltir ji L theboilingfpointof wateris reachetLlsucll 'hoilingfpoints heing,indicatedon the scale W t ef en h tet o aryi o nte 9% V Due' to the length of theband 56, it ,will be I seen theton'ce the alcollol indicationfis given,v

the same willbe continued to thatofthe hoilv a t m'es o er t n hose dwhen thered'col'or'is showingthegreen will i be. showingindicating-safety, J

monntingf'fi A il b Y is n fwm F eu e fi, end? 'eg s er ngfi i p ovided;the.f om 1 of instrument, end is heldg therei i v "i'nean's ofa jhezelii the embodiment last described, inoVenient of asingle indieatingmemher,indicatesnot only i thetemperature (or other value) to be meas-Inents. which indicate temperetnres, itiwill i be understood that theinventionis ieqnallyg of number of quantities. I

' .lt Will1be ;funthernnderstoodthat Various changes may he made in theform and condescribed in detail'. withoutdeperting from 'ing' a somewhatsimilanectu-ating mecha the spirit of n'lyj-inventionnnd the scope of'Tjindicatorgiving Values;- over the" operating "applicable to devicesfor indicatinga-ny-one if ,11

, 'struction of the specific'emhodimentqahove V v, rz ng1e'oiitheinstrnmeht, means forjectiieting" siine inlresponse' to Variationinmotortemperegture's,rend gm auxilizi yfindicetor actu-c w "atedthrough saidinain ndicator giiling v 'wg rning'; signal at substantiallythe 'hoi-li ig P ofwater;

c 2. In indi ating 9 K is int of alcohol and'awa r ningsignal that I 3lvic'e, an indicator I ",roper',enauxiliaryindlczitorjor signalinem ca,si htoienifigthi r n;

en e mtenom', jandfcontinuously aetui- I y "29in auxiliary indlcetorbehindf said' dialand V, cheer ng idlfierent nclicie,seldlauxillalfiygmV nslynematedi y said, tioned',ffhe ir't s being cor;

6. In an indicating device adapted to give motor temperatures, a dial, amain indicator cooperating therewith, an auxiliary indicator separatefrom and continuously actuated through said main indicator, means foractuating same in response to variation in motor temperatures, said dialhaving a pair of sight openings for viewing said auxiliary indicator,said auxiliaryindicator being arranged so as to exhibit through saidopenings danger conditions corresponding to the boiling points ofalcohol and of water respectively when the temperatures represented bysuch boiling points are reached.

7. In an indicating device adapted to give motor temperatures, a dial, amain indicator cooperating therewith, :an auxiliary indicator, means forcontlnuously drivlng said auxiliary indicator with said main indicatorsaid auxiliary indicator beingin the form of a disc having a uniformcolor except for a 7 pair ofspots of a different color, said dial havingseparate sight openings for viewing the pathof travel of said spots, thelatter being arrangedso as to be exhibited when.

the boiling point of alcohol and that of water are respectively reached.

, 8. In a temperature indicating device adapted to give motortemperatures, a main indicator giving values over the operating rangeofthe instrument, means i or actuatlng same in response to variations 111motor 7 temperatures and auxiliary lndicatmg means glvlng a warningsignal at substantially the boiling points of two difierent coolingmedia.

9. In an indicating device adapted to give 7 motor temperatures, a dial,a main indicator cooperating therewith, an auxiliary indicator, meansforactuatingv said indicators in response to varlatlons in motortemperatures, said dlal having a palr of s ght openlngs for viewing saidauxiliaryindicator, said auxiliary indictor being arranged to beexhibited through said openings when the boiling point of water and thatof a cooling medium other 1 than water are respectively reached.

In testimony whereof I have aflixed my signature to this specification.

HERMAN SOI-ILAICH,

